2D-T700/E44 composites are prepared by natural curing process, heating curing process and improved compression moulding process (ICM) severally. Test shows the bending strengths of the composites prepared by three processes are 260, 390 and 605 MPa respectively. By observing the microstructure, the composite prepared by the natural curing process has many infiltration voids and cracks in the bending fracture, so the bending strength is low. The composite prepared by the heating curing process also has a small number of voids and cracks in the bending fracture. However, the defects are less than the former. This is due to the high-temperature environment enhances the fluidity of the resin during the period of heating curing. When the ICM is used, the composite is infiltrated in high temperature and high pressure. The voids and cracks are well controlled, so the bending strength reaches 605 MPa. The ICM is beneficial to prepare high-performance materials.
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